[go: up one dir, main page]

Search a number
-
+
261421556 = 22115941399
BaseRepresentation
bin11111001010011…
…11100111110100
3200012220120221212
433211033213310
51013410442211
641535100552
76323021654
oct1745174764
9605816855
10261421556
11124624980
1273671758
1342211316
1426a10364
1517e3d38b
hexf94f9f4

261421556 has 12 divisors (see below), whose sum is σ = 499077600. Its totient is φ = 118827960.

The previous prime is 261421487. The next prime is 261421571. The reversal of 261421556 is 655124162.

It is a super-2 number, since 2×2614215562 = 136682459882922272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2970656 + ... + 2970743.

It is an arithmetic number, because the mean of its divisors is an integer number (41589800).

Almost surely, 2261421556 is an apocalyptic number.

It is an amenable number.

261421556 is a deficient number, since it is larger than the sum of its proper divisors (237656044).

261421556 is a wasteful number, since it uses less digits than its factorization.

261421556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5941414 (or 5941412 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 261421556 is about 16168.5359881469. The cubic root of 261421556 is about 639.4115326494.

The spelling of 261421556 in words is "two hundred sixty-one million, four hundred twenty-one thousand, five hundred fifty-six".

Divisors: 1 2 4 11 22 44 5941399 11882798 23765596 65355389 130710778 261421556